Liquid reagent feeder



Dec. 1, 1931.

c. E. STEERE LIQUID REAGENT FEEDER Filed 001;. 5, 1929 2 Sheets-Sheet l Dec. 1, 1931. v c, STEERE 1,834,435

LIQUID REAGENT FEEDER Filed 001:. 5, 1929 2 Sheets-Sheet 2 Patented Dec. 1, 1931 UNITEF STATES 5 OF ICE I CLARENCE E. STEERE, 0F LOS ANeELEs, CALTFORNIA, AssreNoR TO soUrHwEs'rERN ENGINEERING CORPORATION, or Los ANGEL s, ALIFOR IA, A CORPORATION or CALIFORNIA LIQUID REAGENT FEEDER Application'filed October 5,1929.v Serial No. 397,547.

at ate at the rims or the wheels 16 which This invention relates generally to feeders p is removed therefrom in required amounts by more particularly to a device of the character adapted to feed liquid reagents.

In certain industries and chemical labora- 5 tories Where liquid reagents are employed it is essential that they be fed to the elementbeing treated in exact quantities, for eX- ample, one drop or more per minute to several ounces according to requlrements.

The object of this invention is to providea liquid feeder capable of continually and accurately feeding a required amount of liquid. 7 Another object of this invention is to pro- A p .orrod 35 supported by boxes 36 secured to the vide a liquid feeder having adjustable means whereby the feed of liquid may be varied to l-" I H slidably mounted in openings 39 of'housings meet given requirements.

Other objects and advantages will be apparent from the following description of the I accompanying drawings, in which:

Fig. 1 is a top plan view of the feeder; Fig. 2 is an end elevation of the feeder;

Fig. 3 is a vertical sectional view taken on. line 33 ofFig. l in the direction indicated by the arrows;

Fig. 4 is a sectional view similar to Fig. 3

taken on line 1-4: of Fig. 1.

Referring to the drawings,- 10 generally. designates a tank or receptacle having a plurality of compartments 12 formed by partitions 14; if desired one tank only may be employed. Each compartment is adapted tov hold a quantity of liquid L in which a wheel or disk 16 is partly submerged, the Wheels being secured to a shaft 18 extending across the top of the tank, one end of which is}, mounted in a bearing 20, the other end eX-. tending into the case 21 of a suitable reduction gear mechanism not shown.

Rotation of the shaft 18 is effected by an: electric motor 22 adapted to impart rotation, of the shaft 23 of the reduction gear mecha;

nism through a pulley 24 thereon and pulley 25 of the motor by means of a belt 26. The

shaft 18- may be driven directly from a line fla wara c r From the foregoing it will be seen that during rotation of the, wheels the liquidcolderstood that the wheels revolve at a speed great enough to carry the liquid adhering to the face of thefrim into the tubes but not L. great enoughtothro'w it from the rim by con-' tri'fugalforce.

Each tube31 18 carried by an individual bracket aetoaebiy mounted on a fixed shaft side Wall 37 of the tank 10. Thetubes 31"are:

40 formed integralwith the'brackets and are held inplace: therein by set screws42,f the under sides-43 of the tubes resting on jack screws 44; threaded into bracketsv 45fsecuredz to the side wall of the tank.

;. .By-movi11g the tube in-thehousings and manipulating the jackscrew 4A the tube may be adjusted so that the end 32 of the tube V will touch the face 29 ,ofthe wheel rim with lecting on the faces. of the rims will enter the ends ofthe tubes and,be removed there-.

from. as long'as the tubes engage thew-heels, Zthus giving a constantor maximum flow of liquidfrom the wheels through the tubes.

However in order to reduce the feed of liquid the :tubes are arranged to engage the .wheels during a fraction of each revolution, this-action being accomplished by eccentrics T 50 secured to the shaft 18 and adapted toengage blocks 51 on the ends of the leversf52 which tilt the brackets and lift the ends of.

the tubes outof engagement with the faces ofthewheels during part of eachrevolution.

The-levers 52 extend through openings 53 in lugs54 and 55 formed on the brackets 34 and have threaded cncls56 engaged by thumb.

nuts 57 adapted to move the block toward the eccentric against the action of an expansion. coil spring 58 surrounding the lever between the lugs 54 and fixed collars 59.

From the construction it will be seen that;

by manipulating the thumb nut, the distance between the face 60 of the eccentric and the tapered face 61 of the block may be varied, hence when the face of the block is beyond or out of the path traversed by the eccentric the tube will bear on the face of the Wheel during each revolution, thereby giving a constant and maximum feed. By drawing the block into the path of the eccentric the tubes will be raised from the face of the wheels during part of each revolution, thereby cutting off the feed during this interval, hence the feed may be varied from a constant flow to a few drops per minute or any required amount between the maximum and minimum.

I claim:

l. A device of the character described comprising a tank adapted to hold a quantity of liquid, a shaft extending across the top of said tank, means for rotating said shaft, a wheel secured to said shaft and partially submerged in the liquid in said tank, a tube having one end thereof engaging the rim of said wheel, a rod parallel with said shaft, a bracket pivotally mounted on said rod supporting said tube, a lever connected to said bracket, a block on the end of said lever, m

eccentric on said shaft adapted to engage the block on said lever and lift said tube out of engagement with the rim of saidwheel, and

"means for adjusting the position of said block in relation to the path traversed by said eccentric for the purpose of varying the time of contact of said tube on the rim of said wheel during each revolution of said wheel.

2. A device of the class described comprising a liquid holding tank, a shaft mounted on said tank and means for rotating the same,

a wheel fast to said shaft for collecting liquid on its rim from said tank during its rotation, a rod mounted on said tank and parallel with said shaft, a bracket fast to said shaft, a liquid collecting tube adjustably secured to said bracket, one end of said tube engaging the rim of said liquid collecting wheel, a lever connected to said bracket, its free end disposed over said wheel carrying shaft and provided with a lever lifting block, an eccentric on said shaft for engaging the lifting block to lift the liquid collecting tube out of contact with said liquid collecting wheel, and spring actuated means on said bracket for adjusting the lifting block with relation to said eccentric for varying the time of contact of the tube with the liquid col lecting wheel during each revolution of the wheel.

In testimony whereof I affix my signature.

' CLARENCE E. STEERE. 

